I actually bought one of those "Bogus MPG Gadgets." I bought the "Gas-Saving Tornado for my 2004 Hyundai Elantra. I will tell you my engine got louder, more responsive, and about half-a-mile better in MPG.
1 - 1 of 17 Posts
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to Scion XB owners and enthusiasts. Come join the discussion about engine swaps, performance, modifications, classifieds, troubleshooting, maintenance, and more!